Dental



I. LEE.

DENTAL APPLMNCE.

Amlcmou man rsa. n. ma.

1 ,3 1 7, 980. Patented Oct. V7, 1919.

INVENTOR I afm Lee Z l BY Z ATTORNEY Inva Las, or sagrrnn, WASHINGTON.

:PETT-PAI, APPLIANQE.'

specificati@ of Letters YPatent.

Patente@ @esta 'zu Application tiled inFebruary 11, 1919. Serial No.276,298.

To all whom 'it may concer-n:

Be is known that I, RA LEE., a citizen of the United States, residing atSeattle, in the county of King and State of Washington, have inventedcertain new and useful Improvements in Dental Appliances, of which thefollowing is a. s ecification.

This invention re ates to dental apparatus and, more especially, todevices adapted to be used in connection with a tooth grinding or boringappliance for supplying Water for cooling or cleansing a toothbeing'operated upon.

The object of the invention is the provision of a simple, eilicientandiconveniently operated attachment of the above-mentioned character,arranged to be attached to the socalled hand-piece of a dental boringapparatus, and controlled by a vfinger of the operator-s hand in whichsaid hand-piece is grasped, and 'al'ords'a 'stream ol water of aselected size and in a selected direction.

The invention is illustrated in the accompanying drawings, in which-Figure 1 is a side elevational view of a portion of a dentiststooth-grinding apparatus with appliances embodyingr the presentinvention shown in longitudinal section attached thereto. Fig. 2 is atransverse sectional view through 2--2 of Fig. 1. Fig. 3 is aperspective View of a member of the valve-opening device.

Referring to the drawings, numeral 5 designates a hand-piece such ascommonly used by dentists, into which extends a flexible shaft 6 fordriving a grinding Wheel 7 or the like.

In carrying out my invention, I provide a casin comprlsing two members 8and 9 connect together by interftting screw threads 10 and having adetachable nozzle 11 provided on the forward end of the member 8. Saidcasing is ada ted to be detachably connected to the han -piece 5 by theprovision on the casing of spring clips 12.

The interior of the casing is divided into two cylindrical chambers 13and 14 'by means of a partition 15 formed with a stuing box 16 for whichis provided a gland nut 17.

The forward end of the casing chamber 13 is provided with a taperingseat 18 for a conical valve 19 which' is utilized to regulate thedischarge of a liquid from chamber '3, located in a peripheral recess 29of 13 through the nozzle 11. The valve 19 is provlded with a cavit 20into which extends a tubular stem 21 of less diameter than said, recessand is secured to the valve by means of a pin 22 extending diametricallythrough the coupled parts. Stem 21 extendsthrough said stuffing box andis formed integral with a relatively large body 23 arranged for axialmovements in the casing chamber 14. n A rearwardly directed nippleextension 24 1s provided -on body 23 for connection with a rubber tube26 by which water under pres: sure is supplied through the duct 25, 2,51of the aforesaid body and stem into the chamber 13.

27 represents a helical spring interposed between the gland nut 1? andthe Valve 13 for yielding-ly retaining the latter its seat 18.

To open the valve I provide a longitudi nal iexible bai'- 28, showndetached zinfFri-g. the body 23 and having its rear end engaged in aslot 30 extending from said recess. The part or tongue 281 of the barWithin slot 30 is odset by a relatively inclined central part 282 fromthe tongue 283 at the other end of the bar.

The tongue 283 is bifurcated to aiord a slot 284 to receive the neck 31of a stud 311 which is tted for movement radially of the device in anaperture 32 of the casing memer 9. On outer end of stud 311 is a headWith the valve 19 seated, the bar 28 will be in its ilexed normal state,as sho-Wn in Figs. 1 and 2, to retain the stud 311 in its outermostposition. By pressure down on the stud, however, the bar isstraightened, resulting in the body 23 and its stem element 21 beingpushed rearwardly to eect the opening of the valve for the discharge ofWater.

By pressing the stud down to different extents, the amount of the valvesopening movement may obviously be regulated with a consequent variationin the quantity of water discharged.

The nozzle 11, as illustrated, is directed to deliver water upon thegrinding wheel 7 to prevent the same becoming hot.

If desired, the nozzle may be employed to deliver cooling water againstor into the cavity of a tooth, either b turnin the nozzie, as indicatedby dette lines 1 so that the whee1^7 will not interfere, and by suitablymanipulating the hand piece, Water can be discharged upon a tooth.

What I claim is- 1. In a device of the character described, a casinhaving it Huid discharge opening at one en n valve sont provided in thecasin f adjacent to said opening, a vulve for sai seat, a spring tendingto retain seid valve on the sent, a fluid suppl tube, connectionsprovided in the casing etween seid tube and the valve, said connectionhaving a Huid passage extending therethrough and affording communicationbetween said tube and the interior of the casing in proximity to seidvalve seat, and means for effecting movements to said connectionswhereby the valve is Withdrawn from its seat for the discherge of liquidfrom the device.

2. In combination With the hand-piece of dental grinding apparatus, adevice comprising a tubular casing with a liquid discharge opening atone end, e valve sent provided interiorly of the casing adjacent to saiddischarge opening, a. valve for said seat, e body having a ductextending therethrough and arranged for reciprocal-,cry movements in thecasing, said body being operatively connected with said valve, and meansactuated by the operator through the medium of said body for ectuetinthe v'alve.

3. A device use in connection with the hand-piece of dental apparatus,comprising a cesin a nozzle attachment therefor, said casing ing dividedinto two chambers, one of said chambers communicating with the passageextending through seid nozzle end formed to provide a valve sent at theend of the chamber adjacent to seid nozzle, a springclosing valve forsaid seat, a body mounted for reciprocetory movements in the cheniberremote from the nozzle end of the casing, said body having an axialpassage and extensions from each of its ends, one of seid extensionsserving as a stem for the vulve, and the other extension serving as enipple hose-coupling element, a stud arranged for movements radially ofthe device in a hole l provided in the casing thereof, and a Hexibie barhavin one of its ends connected to seid body and its other end connectedto the stud whereby the latter may be utilized to effect the opening ofthe valve with respect to its seat.

Signed at Seattle, Washington, this 5th dey of February, 1919.

IRA LEE.

Witness E. PETERSON.

Oopes of this patent may be obtained fer ve cents each, by addressingthe "Commissioner of Patents, Washington, D. C.

